A hydraulic independent suspension device for trailer

Abstract

The present invention relates to the field of automotive technology, and more particularly to a hydraulic independent suspension device for a trailer, comprising a support arm, one end of which is rotatably connected to a trailer suspension support, the other end of which is provided with a single half-axle, on which a brake disc is mounted; a mounting base is provided on the support arm at one end proximal to the half-axle, with the mounting base and the brake disc positioned on either side of the support arm; a hydraulic cylinder and a shock absorbing mechanism are spaced apart on the mounting base; the other ends of the hydraulic cylinder and the shock absorbing mechanism are respectively connected to the trailer frame. By adopting the above-described technical solution, the shock absorbing method can be automatically adjusted according to different vibration levels, thereby achieving a better shock absorbing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to a hydraulic independent suspension device for a trailer. Background Art

[0002] A car's suspension system (also known as the suspension), like the engine and transmission, is one of the three major components of a car. It plays a crucial role in a car's handling performance, with different suspension structures resulting in different handling characteristics. Common suspension systems can be categorized as independent and non-independent. Non-independent suspension systems use a rigid axle to connect the left and right wheels, but the two wheels are not independent of each other. Independent suspension systems lack a rigid axle to connect the left and right wheels, eliminating interference between the wheels and resulting in improved comfort and handling.

[0003] Existing independent suspension systems, such as those described in Chinese Patent Publication No. 205439870U, include a support guide plate to which a single half-axle is fixed. The half-axle is equipped with a wheel, tire, brake disc, and other structures. The support guide plate is pivotally connected to the vehicle's suspension support at one end, away from the half-axle, while the other end is connected to the trailer frame via a hydraulic cylinder. With the development of independent suspension systems, existing technologies often incorporate shock-absorbing springs on the support guide plate, which are also connected to the trailer frame. During operation, the hydraulic cylinder and shock-absorbing spring work together to provide support and shock absorption.

[0004] During use, it was found that when the shock-absorbing spring and the hydraulic cylinder were set to work together, the shock-absorbing effect of the trailer was still poor, and the hydraulic independent suspension device needed to be further improved to further improve the shock-absorbing effect of the hydraulic independent suspension device. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the shortcomings of the existing technology, the present invention provides a hydraulic independent suspension device for a trailer, which can automatically adjust the shock absorption mode according to different vibration levels, thereby achieving a better shock absorption effect.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, an embodiment of the present application provides a hydraulic independent suspension device for a trailer, including a support arm, one end of which is rotatably connected to the trailer suspension support, and the other end of the support arm is provided with a single-sided half-shaft, and a brake disc is provided on the single-sided half-shaft; a mounting seat is provided on the support arm and at one end close to the single-sided half-shaft, and the mounting seat and the brake disc are located on both sides of the support arm; a hydraulic cylinder and a shock absorbing mechanism are arranged at intervals on the mounting seat; the other ends of the hydraulic cylinder and the shock absorbing mechanism are respectively connected to the trailer frame.

[0009] and a support frame mounted on the support bracket of the vehicle frame, wherein the support frame is provided with a support rod and the support rod is connected with the support bracket of the vehicle frame to the support bracket of the vehicle frame.

[0010] Preferably, the first shock-absorbing assembly includes a first shock-absorbing spring sleeved on the outside of the support sleeve and a buffer sleeve fixed on the mounting plate and located on the outside of the guide column, the diameter of the buffer sleeve being larger than the outer diameter of the support sleeve; the end of the buffer sleeve away from the mounting plate abuts against the first shock-absorbing spring and is detachably connected, and the first shock-absorbing spring is in a compressed state.

[0011] Preferably, a first connecting plate is fixed to one end of the first shock-absorbing spring close to the buffer sleeve, a first connecting ring is formed on the outer side of the first connecting plate, and the end of the buffer sleeve is located in the first connecting ring; an annular limiting groove is provided on the outer wall of the buffer sleeve; a plurality of locking holes are provided on the circumferential side wall of the first connecting ring at intervals along the circumferential direction, a locking screw is threadedly connected to the locking hole, and one end of the locking screw passes through the locking hole and abuts against the annular limiting groove.

[0012] Preferably, the inner side of the support sleeve is a circular hole; the second shock-absorbing assembly includes an adjusting platform slidably connected to the support sleeve, and the adjusting platform is circular; an adjusting screw hole is provided on the shock-absorbing support plate and located in the support sleeve, and an adjusting screw is provided on a side of the adjusting platform close to the shock-absorbing support plate, one end of the nut of the adjusting screw is located under the shock-absorbing support plate, the adjusting screw is threadedly connected to the adjusting screw hole, and one end of the adjusting screw located in the support sleeve abuts against the adjusting platform; a shock-absorbing column is provided at one end of the guide column away from the mounting plate, the diameter of the shock-absorbing column is larger than that of the guide column, and a second shock-absorbing spring is provided between the shock-absorbing column and the adjusting platform; the second shock-absorbing spring is located in the support sleeve; one end of the shock-absorbing column away from the guide column is slidably connected to the support sleeve.

[0013] Preferably, the secondary shock-absorbing assembly includes a slip ring slidably connected to the guide column and a third shock-absorbing spring located on the guide column, one end of the third shock-absorbing spring abuts against the slip ring, and the other end abuts against the mounting plate; the slip ring abuts against the end of the shock-absorbing column under the action of the third shock-absorbing spring; the length of the support sleeve is greater than the length of the shock-absorbing column, and when the support sleeve slides, it passes over the shock-absorbing column and can abut against the slip ring.

[0014] Preferably, the shock-absorbing column is provided with a penetrating step hole along the axial direction, a locking screw is provided in the step hole, the cross-section of the step hole along the vertical axial direction is rectangular, the guide column is integrally formed with a limiting block at one end away from the mounting plate, the limiting block is embedded in the step hole, and the locking screw is threadedly connected to the limiting block.

[0015] Preferably, a slider is provided on the outer side of the adjustment platform along the axial direction, a sliding groove is provided on the inner side wall of the support sleeve along the axial direction, and the slider is engaged in the sliding groove and slides.

[0016] (3) Beneficial effects

[0017] The present invention provides a hydraulic independent suspension system for trailers, which utilizes a shock-absorbing mechanism in conjunction with a hydraulic cylinder to achieve shock absorption. During the shock absorption process, the first, second, and secondary shock-absorbing assemblies, when subjected to minor vibrations, work together with the hydraulic cylinder to provide shock absorption. However, when subjected to larger vibrations, the relative displacement of the support sleeve and guide column increases, causing the secondary shock-absorbing assembly to be squeezed and, in turn, to work together with the first, second, and hydraulic cylinders to achieve shock absorption. This system automatically adjusts the shock absorption method to suit varying vibration levels, thereby achieving optimal shock absorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a hydraulic independent suspension device for a trailer according to the present invention;

[0019] Figure 2 The present invention is a cross-sectional view of a protruding shock-absorbing mechanism in a hydraulic independent suspension device for a trailer.

[0020] In the accompanying drawings:

[0021] 100, support arm; 110, single-side half shaft; 200, brake disc; 300, mounting seat; 400, hydraulic cylinder; 500, shock absorber mechanism; 510, shock absorber support plate; 511, adjusting screw hole; 520, support sleeve; 521, circular hole; 522, slide; 530, mounting plate; 540, guide column; 541, limit block; 550, first shock absorber assembly; 551, first shock absorber spring; 552, buffer sleeve; 5 521. Annular limit groove; 553. First connecting plate; 554. First connecting ring; 5541. Locking hole; 555. Locking screw; 560. Second shock-absorbing assembly; 561. Adjusting platform; 5611. Sliding block; 562. Adjusting screw; 563. Shock-absorbing column; 5631. Step hole; 5632. Locking screw; 564. Second shock-absorbing spring; 570. Secondary shock-absorbing assembly; 571. Slip ring; 572. Third shock-absorbing spring. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example

[0024] The present invention provides a trailer hydraulic independent suspension device, see Figure 1-Figure 2 The system comprises a support arm 100, one end of which is rotatably connected to the trailer suspension support. A single half-shaft 110 is provided at the other end of the support arm 100, and a brake disc 200 is mounted on the single half-shaft 110. A mounting base 300 is provided on the support arm 100 at one end, located near the single half-shaft 110. The mounting base 300 and the brake disc 200 are located on either side of the support arm 100. A hydraulic cylinder 400 and a shock absorber 500 are spaced apart on the mounting base 300. The other ends of the hydraulic cylinder 400 and the shock absorber 500 are respectively connected to the trailer frame. During operation, the hydraulic cylinder 400 and the shock absorber 500 cooperate to achieve a shock absorption effect.

[0025] Specifically, the shock-absorbing mechanism 500 includes a shock-absorbing support plate 510 rotatably mounted on the mounting seat 300, a support sleeve 520 is fixedly arranged on the shock-absorbing support plate 510, a mounting plate 530 is arranged above the shock-absorbing support plate 510, and the mounting plate 530 is rotatably connected to the trailer frame; the rotation circumferences of the mounting plate 530 and the shock-absorbing support plate 510 are parallel to each other, and are the same as the rotation direction of the support arm 100 and the trailer suspension support.

[0026] A guide post 540 is fixed to a side of the mounting plate 530 close to the shock-absorbing support plate 510 , and the guide post 540 and the support sleeve 520 are concentrically arranged.

[0027] A first shock absorbing assembly 550, a second shock absorbing assembly 560, and a secondary shock absorbing assembly 570 are disposed between the shock absorbing support plate 510 and the mounting plate 530. The first shock absorbing assembly 550 is located outside the support sleeve 520 and the guide post 540; the second shock absorbing assembly 560 is located inside the support sleeve 520; and the secondary shock absorbing assembly 570 is located outside the guide post 540. The first and second shock absorbing assemblies 550 and 560 provide shock absorption when the shock absorbing support plate 510 and the mounting plate 530 move toward each other. After the shock absorbing support plate 510 and the mounting plate 530 move toward each other for a certain distance, the support sleeve 520 abuts against the secondary shock absorbing assembly 570 to provide shock absorption. With the above arrangement, when the hydraulic independent suspension system is used, when subjected to minor vibrations, the first shock-absorbing assembly 550, the second shock-absorbing assembly 560, and the hydraulic cylinder 400 cooperate to provide shock absorption. However, when subjected to larger vibrations, the relative displacement between the support sleeve 520 and the guide post 540 is significant, and the secondary shock-absorbing assembly 570 is squeezed, thereby cooperating with the first shock-absorbing assembly 550, the second shock-absorbing assembly 560, and the hydraulic cylinder 400 to provide shock absorption. This approach automatically adjusts the shock absorption method to different vibration levels, thereby achieving a better shock absorption effect.

[0028] The first shock absorbing assembly 550 includes a first shock absorbing spring 551 sleeved on the outside of the support sleeve 520 and a buffer sleeve 552 fixed on the mounting plate 530 and located outside the guide column 540. The diameter of the buffer sleeve 552 is larger than the outer diameter of the support sleeve 520.

[0029] The end of the buffer sleeve 552, away from the mounting plate 530, abuts against the first shock-absorbing spring 551 and is detachably connected thereto. The first shock-absorbing spring 551 is in a compressed state. During operation, when encountering vibrations, the buffer sleeve and the support sleeve 520 slide relative to each other. During this sliding process, the relative abutment between the buffer sleeve 552 and the first shock-absorbing spring 551 achieves a shock-absorbing effect.

[0030] Specifically, a first connecting plate 553 is fixed to one end of the first damping spring 551 near the buffer sleeve 552. A first connecting ring 554 is formed on the outer side of the first connecting plate 553. The end of the buffer sleeve 552 is located within the first connecting ring 554. An annular retaining groove 5521 is formed on the outer wall of the buffer sleeve 552. A plurality of locking holes 5541 are spaced apart along the circumferential direction on the circumferential sidewall of the first connecting ring 554. A locking screw 555 is threadedly connected to the locking hole 5541. One end of the locking screw 555 passes through the locking hole 5541 and abuts against the annular retaining groove 5521. This arrangement connects the first damping spring 551 and the buffer sleeve 552. This ensures that the upper end of the buffer sleeve 552 is always in contact with the lower end of the first damping spring 551, thereby ensuring a good damping effect.

[0031] The inner side of the support sleeve 520 is a circular hole 521 . The second shock absorbing assembly 560 includes an adjustment platform 561 slidably connected to the support sleeve 520 . The adjustment platform 561 is circular.

[0032] An adjustment screw hole 511 is provided on the shock-absorbing support plate 510 and within the support sleeve 520. An adjustment screw 562 is provided on a side of the adjustment platform 561 adjacent to the shock-absorbing support plate 510. One end of the nut of the adjustment screw 562 is located below the shock-absorbing support plate 510. The adjustment screw 562 is threadedly connected to the adjustment screw hole 511, and one end of the adjustment screw 562 located within the support sleeve 520 abuts against the adjustment platform 561. During use, when the adjustment screw 562 is selected, the length of the adjustment screw 562 within the support sleeve 520 can be adjusted, thereby controlling the height of the adjustment platform 561.

[0033] Specifically, a slider 5611 is provided on the outer side of the adjustment platform 561 along the axial direction, and a slide groove 522 is opened on the inner side wall of the support sleeve 520 along the axial direction. The slider 5611 is embedded in the slide groove 522 and slides in the slide groove 522.

[0034] A shock-absorbing column 563 is provided at the end of the guide column 540 away from the mounting plate 530. The diameter of the shock-absorbing column 563 is larger than that of the guide column 540. A second shock-absorbing spring 564 is provided between the shock-absorbing column 563 and the adjustment platform 561. The second shock-absorbing spring 564 is located within the support sleeve 520. The end of the shock-absorbing column 563 away from the guide column 540 is slidably connected to the support sleeve 520. During operation, when the trailer is subjected to vibration, the shock-absorbing column 563 slides relative to the support sleeve 520, abutting against the second shock-absorbing spring during the sliding process, thereby achieving a vibration-reducing effect.

[0035] The secondary shock-absorbing assembly 570 includes a slip ring 571 slidably connected to the guide post 540 and a third shock-absorbing spring 572 located on the guide post 540. One end of the third shock-absorbing spring 572 abuts the slip ring 571, and the other end abuts the mounting plate 530. The slip ring 571 abuts the end of the shock-absorbing post 563 under the action of the third shock-absorbing spring 572. The support sleeve 520 is longer than the shock-absorbing post 563, and when the support sleeve 520 slides, it can pass over the shock-absorbing post 563 and abut the slip ring 571.

[0036] When the trailer is subjected to minor vibrations, the support sleeve 520 slides along the length of the shock-absorbing column 563 and does not abut the slip ring 571. During this process, the first and second shock-absorbing assemblies cooperate with the hydraulic cylinder 400 to provide shock absorption. When the trailer is subjected to larger vibrations, the vibration force causes the support sleeve 520 to pass over the shock-absorbing column 563 and abut the slip ring 571. This abutment causes the slip ring 571 to slide, and the third shock-absorbing spring cooperates to provide shock absorption.

[0037] Specifically, the shock-absorbing column 563 is provided with a penetrating step hole 5631 along the axial direction, and a locking screw 5632 is arranged in the step hole 5631. The cross-section of the step hole 5631 along the vertical axial direction is rectangular. The guide column 540 is integrally formed with a limiting block 541 at the end away from the mounting plate 530. The limiting block 541 is embedded in the step hole 5631, and the locking screw 5632 is threadedly connected to the limiting block 541.

[0038] The present invention provides a hydraulic independent suspension device for a trailer, which uses a shock-absorbing mechanism to cooperate with a hydraulic cylinder to achieve shock absorption. During the shock absorption process, a first shock-absorbing assembly, a second shock-absorbing assembly, and a secondary shock-absorbing assembly are provided. When using the hydraulic independent suspension device, when subjected to relatively small vibrations, the first shock-absorbing assembly 550, the second shock-absorbing assembly 560, and the hydraulic cylinder 400 cooperate to achieve shock absorption. However, when subjected to relatively large vibrations, the relative displacement of the support sleeve 520 and the guide column 540 is relatively large. At this time, the secondary shock-absorbing assembly 570 will be squeezed and cooperate with the first shock-absorbing assembly 550, the second shock-absorbing assembly 560, and the hydraulic cylinder 400 to achieve shock absorption. This method can automatically adjust the shock absorption method according to different vibration levels, thereby achieving a better shock absorption effect.

[0039] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "back" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0041] The above-described embodiments merely illustrate the implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A trailer hydraulic independent suspension device, characterized by: It comprises a support arm (100), one end of the support arm (100) is rotatably connected to a trailer suspension support, the other end of the support arm (100) is provided with a single-sided half shaft (110), and a brake disc (200) is provided on the single-sided half shaft (110); A mounting seat (300) is provided on the support arm (100) and at one end close to the single-sided half shaft (110), and the mounting seat (300) and the brake disc (200) are located on both sides of the support arm (100); A hydraulic cylinder (400) and a shock absorbing mechanism (500) are arranged at intervals on the mounting seat (300); the other ends of the hydraulic cylinder (400) and the shock absorbing mechanism (500) are respectively connected to the trailer frame; the shock absorbing mechanism (500) comprises a shock absorbing support plate (510) rotatably mounted on the mounting seat (300), and a support sleeve (520) is fixedly arranged on the shock absorbing support plate (510). A mounting plate (530) is provided above the shock-absorbing support plate (510), and the mounting plate (530) is rotatably connected to the trailer frame; the rotational directions of the mounting plate (530) and the shock-absorbing support plate (510) are parallel to each other and are the same as the rotational direction of the support arm (100) and the trailer suspension support; A guide column (540) is fixed to a side of the mounting plate (530) close to the shock-absorbing support plate (510), and the guide column (540) and the support sleeve (520) are concentrically arranged; A first shock absorbing assembly (550), a second shock absorbing assembly (560) and a secondary shock absorbing assembly (570) are provided between the shock absorbing support plate (510) and the mounting plate (530); The first shock absorbing assembly (550) is located outside the supporting sleeve (520) and the guide column (540); The second shock absorbing assembly (560) is located inside the supporting sleeve (520); the secondary shock absorbing assembly (570) is located outside the guide column (540); The first shock absorbing assembly (550) and the second shock absorbing assembly (560) perform shock absorption when the shock absorbing support plate (510) and the mounting plate (530) move toward each other; after the shock absorbing support plate (510) and the mounting plate (530) move toward each other for a certain distance, the support sleeve (520) abuts against the secondary shock absorbing assembly (570) to perform shock absorption; The first shock absorbing assembly (550) comprises a first shock absorbing spring (551) sleeved on the outside of the support sleeve (520) and a buffer sleeve (552) fixed on the mounting plate (530) and located outside the guide column (540), wherein the diameter of the buffer sleeve (552) is larger than the outer diameter of the support sleeve (520); The inner side of the support sleeve (520) is a circular hole (521); the second shock absorbing assembly (560) includes an adjustment platform (561) slidably connected to the support sleeve (520), and the adjustment platform (561) is circular; The secondary shock-absorbing assembly (570) includes a slip ring (571) slidably connected to the guide column (540) and a third shock-absorbing spring (572) located on the guide column (540), one end of the third shock-absorbing spring (572) abuts against the slip ring (571), and the other end abuts against the mounting plate (530); the slip ring (571) abuts against the end of the shock-absorbing column (563) under the action of the third shock-absorbing spring (572).

2. The trailer hydraulic independent suspension device according to claim 1, characterized in that: One end of the buffer sleeve (552) away from the mounting plate (530) abuts against the first shock-absorbing spring (551) and is detachably connected thereto, and the first shock-absorbing spring (551) is in a compressed state.

3. The trailer hydraulic independent suspension device according to claim 2, characterized in that: A first connecting plate (553) is fixed to one end of the first damping spring (551) close to the buffer sleeve (552); a first connecting ring (554) is formed on the outer side of the first connecting plate (553); and an end of the buffer sleeve (552) is located inside the first connecting ring (554); An annular limiting groove (5521) is provided on the outer side wall of the buffer sleeve (552); a plurality of locking holes (5541) are provided on the circumferential side wall of the first connecting ring (554) at intervals along the circumferential direction, and a locking screw (555) is connected to the inner thread of the locking hole (5541), and one end of the locking screw (555) passes through the locking hole (5541) and abuts against the annular limiting groove (5521).

4. The trailer hydraulic independent suspension device according to claim 1, characterized in that: An adjusting screw hole (511) is provided on the shock-absorbing support plate (510) and located in the support sleeve (520); an adjusting screw rod (562) is provided on a side of the adjusting platform (561) close to the shock-absorbing support plate (510); one end of the nut of the adjusting screw rod (562) is located below the shock-absorbing support plate (510); the adjusting screw rod (562) is threadedly connected to the adjusting screw hole (511); and one end of the adjusting screw rod (562) located in the support sleeve (520) abuts against the adjusting platform (561); A shock-absorbing column (563) is provided at one end of the guide column (540) away from the mounting plate (530); the diameter of the shock-absorbing column (563) is larger than that of the guide column (540); a second shock-absorbing spring (564) is provided between the shock-absorbing column (563) and the adjustment platform (561); the second shock-absorbing spring (564) is located in the support sleeve (520); and the end of the shock-absorbing column (563) away from the guide column (540) is slidably connected to the support sleeve (520).

5. The trailer hydraulic independent suspension device according to claim 4, characterized in that: The length of the support sleeve (520) is greater than the length of the shock-absorbing column (563), and when the support sleeve (520) slides, it passes over the shock-absorbing column (563) and can abut against the sliding ring (571).

6. The trailer hydraulic independent suspension device according to claim 5, characterized in that: The shock-absorbing column (563) is provided with a step hole (5631) extending therethrough along the axial direction, a locking screw (5632) is provided in the step hole (5631), and the cross-section of the step hole (5631) along the vertical axial direction is rectangular. A limiting block (541) is integrally formed at one end of the guide column (540) away from the mounting plate (530), the limiting block (541) is embedded in the step hole (5631), and the locking screw (5632) is threadedly connected to the limiting block (541).

7. The trailer hydraulic independent suspension device according to claim 5, characterized in that: A slider (5611) is provided on the outer side of the adjustment platform (561) along the axial direction, and a slide groove (522) is provided on the inner side wall of the support sleeve (520) along the axial direction, and the slider (5611) is embedded in the slide groove (522) and slides.

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